- A9, 13, 17
- B7, 13, 19
- C10, 14, 18
- D8, 13, 18
Step-by-Step Solution
Five terms: 21 = 5 + 4d, so d = 4. The blanks are 9, 13, 17. 10, 14, 18 uses d = 4 but starts wrongly.
Answer: A) 9, 13, 17
Fill the three blanks so that 5, __, __, __, 21 is an AP.
Class 10Properties and Selection of AP TermsAlgebra — Sequences
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